debugging pydb prevents ddd from closing

1) Run ddd to debug pydb
2) Attempt to leave ddd by clicking on 'x'.
3) This fails(you can quit any time, but you can 'never' leave), but it seems to leave the debugged pydb program.

This is ok if you run only one pydb deep. But if you're trying to debug pydb...having what happens to ddd happen to the bottom level pydb doesn't seem to be a very good thing. For the moment, this is a difference between ddd running on pydb and virtually any other program, and it's behaviour that you would probably not expect. I would argue this is a (minor) bug, since it is not so consistent with what you would expect with other programs, in that there does not appear to be enough of a boundary between the debugging environment and the debugged environment.

Ubuntu: 16.10 yakkety

themusicgod1@Hedy:~$ apt-cache policy ddd
ddd:
  Installed: 1:3.3.12-5.1build1
  Candidate: 1:3.3.12-5.1build1
  Version table:
 *** 1:3.3.12-5.1build1 500
        500 http://archive.ubuntu.com/ubuntu yakkety/universe amd64 Packages
        100 /var/lib/dpkg/status
themusicgod1@Hedy:~$ apt-cache policy pydb
pydb:
  Installed: 1.26-2
  Candidate: 1.26-2
  Version table:
 *** 1.26-2 500
        500 http://archive.ubuntu.com/ubuntu yakkety/universe amd64 Packages
        500 http://archive.ubuntu.com/ubuntu yakkety/universe i386 Packages
        100 /var/lib/dpkg/status

ProblemType: Bug
DistroRelease: Ubuntu 16.10
Package: ddd 1:3.3.12-5.1build1
ProcVersionSignature: Ubuntu 4.8.0-22.24-generic 4.8.0
Uname: Linux 4.8.0-22-generic x86_64
ApportVersion: 2.20.3-0ubuntu8
Architecture: amd64
CurrentDesktop: XFCE
Date: Sun Nov 13 23:55:50 2016
EcryptfsInUse: Yes
InstallationDate: Installed on 2014-07-09 (858 days ago)
InstallationMedia: Ubuntu-GNOME 14.10 "Utopic Unicorn" - Alpha amd64 (20140708)
SourcePackage: ddd
UpgradeStatus: Upgraded to yakkety on 2016-10-16 (28 days ago)